On Fri, 17 Jul 2015 10:18:05 +0100, Roland Perry
wrote:

In message
-septem
ber.org, at 08:40:18 on Fri, 17 Jul 2015, Recliner
remarked:

Three separate 3kW charger units are fitted to the battery pack and it
takes 20 hours to recharge the huge battery. Using a three-phase electrical
supply it takes eight hours for a full charge.

Hmm. 90 amps on three-phase. What people often forget is that the
National Grid is on record as saying that these kinds of additional
power draw are unsustainable for anything more than a fraction of
vehicles.

(And it's not just the main grid, but also the local supplies and
substations).

Yes, it's scary. Imagine how much more current the bus charger will
draw. And then multiply it by the number of buses on the route,
several of which may be being charged simultaneously.

And then consider how small the grid's safety margin will be next
winter. And how much of that 'clean' power still comes from fossil
fuels...